Sitting in a Durham County jail cell, Frank M. Lombard, the Duke University researcher accused of offering his adopted 5-year-old son for sex, awaits a trip to Washington, D.C., this week to face federal criminal charges.

Federal authorities say Lombard, 42, of 24 Indigo Creek Trail, performed sexual acts on his son and invited an undercover investigator online to fly to North Carolina and do the same.

Lombard owns the home with another man, according to Durham County property records. The pair bought the home, which sits at the end of a narrow path lined with trees and multicolored homes, in May 2007, the records show. The co-owner has not been accused of any wrongdoing.

Lombard, associate director of Duke's Center for Health Policy, was arrested Wednesday evening at his home. Investigators seized two webcams, five computers and a sex toy, among other items, after searching his home.

The 5-year-old and another child in the home were placed in protective custody.